In tens of thousands of miles, I've only ever needed
Spoke wrench
4mm Allen key
5mm Allen key
Flat driver
Chain tool
1 lever
I've broken the Topeak Chain tool, so won't use aluminum chain tools any more.
The Pedros 6 Pack contains 3 of the above (spoke key, flat driver, 5mm, steel chain tool), so I just add a separate 4mm Allen key.
